What quantity of electrons in moles is needed to discharge two moles of aluminum from aluminum oxide (AI 2O3)

Answer Details

In order to discharge two moles of aluminum from aluminum oxide (Al₂O₃), each Al³⁺ ion in the Al₂O₃ must be reduced to Al metal, which requires the gain of three electrons per Al³⁺ ion. Therefore, for two moles of aluminum, there are 2 x Avogadro's number (6.022 x 10²³) of Al³⁺ ions that need to be reduced, and each of these requires 3 electrons. Thus, the total number of electrons needed is 2 x Avogadro's number x 3 = 3.612 x 10²⁴ electrons, which can be expressed as 6 moles of electrons. Therefore, the correct answer is 6.